feat(ffi): wrap Ruma MediaSources and run validations before passing them over FFI

Ruma doesn't currently validate mxuri's and as such `MediaSource`s passed over FFI can contain invalid/empty URLs. This change introduces a wrapper type around Ruma's and failable transformations so that appropiate actions can be taken beforehand e.g. returning a `TimelineItemContent::FailedToParseMessageLike` or nil-ing out the thumbnail info.

Author: stefanceriu

bindings/matrix-sdk-ffi/src/api.udl

@@ -13,10 +13,3 @@ interface RoomMessageEventContentWithoutRelation {
 interface ClientError {
     Generic(string msg);
 };
-
-interface MediaSource {
-    [Name=from_json, Throws=ClientError]
-    constructor(string json);
-    string to_json();
-    string url();
-};

bindings/matrix-sdk-ffi/src/client.rs

@@ -32,9 +32,7 @@ use matrix_sdk::{
             user_directory::search_users,
         },
         events::{
-            room::{
-                avatar::RoomAvatarEventContent, encryption::RoomEncryptionEventContent, MediaSource,
-            },
+            room::{avatar::RoomAvatarEventContent, encryption::RoomEncryptionEventContent},
             AnyInitialStateEvent, AnyToDeviceEvent, InitialStateEvent,
         },
         serde::Raw,
@@ -81,7 +79,7 @@ use crate::{
     notification_settings::NotificationSettings,
     room_directory_search::RoomDirectorySearch,
     room_preview::RoomPreview,
-    ruma::AuthData,
+    ruma::{AuthData, MediaSource},
     sync_service::{SyncService, SyncServiceBuilder},
     task_handle::TaskHandle,
     utils::AsyncRuntimeDropped,
@@ -455,7 +453,7 @@ impl Client {
             .inner
             .media()
             .get_media_file(
-                &MediaRequestParameters { source, format: MediaFormat::File },
+                &MediaRequestParameters { source: source.media_source, format: MediaFormat::File },
                 filename,
                 &mime_type,
                 use_cache,
@@ -728,7 +726,7 @@ impl Client {
         &self,
         media_source: Arc<MediaSource>,
     ) -> Result<Vec<u8>, ClientError> {
-        let source = (*media_source).clone();
+        let source = (*media_source).clone().media_source;
 
         debug!(?source, "requesting media file");
         Ok(self
@@ -744,9 +742,9 @@ impl Client {
         width: u64,
         height: u64,
     ) -> Result<Vec<u8>, ClientError> {
-        let source = (*media_source).clone();
+        let source = (*media_source).clone().media_source;
 
-        debug!(source = ?media_source, width, height, "requesting media thumbnail");
+        debug!(?source, width, height, "requesting media thumbnail");
         Ok(self
             .inner
             .media()

bindings/matrix-sdk-ffi/src/event.rs

@@ -202,7 +202,7 @@ impl TryFrom<AnySyncMessageLikeEvent> for MessageLikeEventContent {
                         _ => None,
                     });
                 MessageLikeEventContent::RoomMessage {
-                    message_type: original_content.msgtype.into(),
+                    message_type: original_content.msgtype.try_into()?,
                     in_reply_to_event_id,
                 }
             }

bindings/matrix-sdk-ffi/src/lib.rs

@@ -33,13 +33,11 @@ mod utils;
 mod widget;
 
 use async_compat::TOKIO1 as RUNTIME;
-use matrix_sdk::ruma::events::room::{
-    message::RoomMessageEventContentWithoutRelation, MediaSource,
-};
+use matrix_sdk::ruma::events::room::message::RoomMessageEventContentWithoutRelation;
 
 use self::{
     error::ClientError,
-    ruma::{MediaSourceExt, Mentions, RoomMessageEventContentWithoutRelationExt},
+    ruma::{Mentions, RoomMessageEventContentWithoutRelationExt},
     task_handle::TaskHandle,
 };
 

bindings/matrix-sdk-ffi/src/room.rs

@@ -973,7 +973,7 @@ impl TryFrom<ImageInfo> for RumaAvatarImageInfo {
 
     fn try_from(value: ImageInfo) -> Result<Self, MediaInfoError> {
         let thumbnail_url = if let Some(media_source) = value.thumbnail_source {
-            match media_source.as_ref() {
+            match &media_source.as_ref().media_source {
                 MediaSource::Plain(mxc_uri) => Some(mxc_uri.clone()),
                 MediaSource::Encrypted(_) => return Err(MediaInfoError::InvalidField),
             }